| accipiter gularis | Yes | species | eukaryota | vertebrates | species | 258530 | click here |
| accipiter nisus | Yes | species | eukaryota | vertebrates | species | 211598 | click here |
| acerodon celebensis | Yes | species | eukaryota | mammals | species | 58057 | click here |
| acinonyx jubatus | Yes | species | eukaryota | mammals | species | 32536 | click here |
| acomys subspinosus | Yes | species | eukaryota | rodents | species | 81631 | click here |
| acridotheres | Yes | | | vertebrates | genus | 245037 | click here |
| acridotheres cristatellus | Yes | species | eukaryota | vertebrates | species | 451382 | click here |
| acridotheres tristis | Yes | species | eukaryota | vertebrates | species | 279927 | click here |
| acrocephalus dumetorum | Yes | species | eukaryota | vertebrates | species | 68474 | click here |
| aepyceros melampus | Yes | species | eukaryota | mammals | species | 9897 | click here |
| aethomys chrysophilus | Yes | species | eukaryota | rodents | species | 121561 | click here |
| aethomys ineptus | Yes | species | eukaryota | rodents | species | 284517 | click here |
| agelaius phoeniceus | Yes | species | eukaryota | vertebrates | species | 39638 | click here |
| agelaius tricolor | Yes | species | eukaryota | vertebrates | species | 9191 | click here |
| ailuropoda melanoleuca | Yes | species | eukaryota | mammals | species | 9646 | click here |
| ailurus fulgens | Yes | species | eukaryota | mammals | species | 9649 | click here |
| aix galericulata | Yes | species | eukaryota | vertebrates | species | 8832 | click here |
| aix sponsa | Yes | species | eukaryota | vertebrates | species | 8833 | click here |
| akodon | Yes | | | rodents | genus | 10069 | click here |
| alcedo cristata | Yes | species | eukaryota | vertebrates | species | 85095 | click here |
| alcelaphus buselaphus | Yes | species | eukaryota | mammals | species | 59517 | click here |
| alectoris chukar | Yes | species | eukaryota | vertebrates | species | 9078 | click here |
| alectoris graeca | Yes | species | eukaryota | vertebrates | species | 40178 | click here |
| alectoris rufa | Yes | species | eukaryota | vertebrates | species | 9079 | click here |
| allocricetulus eversmanni | Yes | species | eukaryota | rodents | species | 329634 | click here |
| alopochen aegyptiacus | Yes | species | eukaryota | vertebrates | species | 30382 | click here |
| amaurornis phoenicurus | Yes | species | eukaryota | vertebrates | species | 261959 | click here |
| amazona aestiva | Yes | species | eukaryota | vertebrates | species | 12930 | click here |
| amazona amazonica | Yes | species | eukaryota | vertebrates | species | 151758 | click here |
| amazona ochrocephala | Yes | species | eukaryota | vertebrates | species | 151761 | click here |
| amazona ochrocephala auropalliata | Yes | subspecies | eukaryota | vertebrates | subspecies | 151762 | click here |
| amazona oratrix | Yes | species | eukaryota | vertebrates | species | 152276 | click here |
| amazona vinacea | Yes | species | eukaryota | vertebrates | species | 244084 | click here |
| anas | Yes | | | vertebrates | genus | 8835 | click here |
| anas acuta | Yes | species | eukaryota | vertebrates | species | 28680 | click here |
| anas carolinensis | Yes | species | eukaryota | vertebrates | species | 75836 | click here |
| anas clypeata | Yes | species | eukaryota | vertebrates | species | 75838 | click here |
| anas crecca | Yes | species | eukaryota | vertebrates | species | 75839 | click here |
| anas cyanoptera | Yes | species | eukaryota | vertebrates | species | 75840 | click here |
| anas discors | Yes | species | eukaryota | vertebrates | species | 75842 | click here |
| anas erythrorhyncha | Yes | species | eukaryota | vertebrates | species | 75843 | click here |
| anas formosa | Yes | species | eukaryota | vertebrates | species | 56278 | click here |
| anas fulvigula | Yes | species | eukaryota | vertebrates | species | 75846 | click here |
| anas melleri | Yes | species | eukaryota | vertebrates | species | 75852 | click here |
| anas platyrhynchos | Yes | species | eukaryota | vertebrates | species | 8839 | click here |
| anas platyrhynchos x cairina moschata | Yes | no rank | eukaryota | vertebrates | species | 8841 | click here |
| anas poecilorhyncha | Yes | species | eukaryota | vertebrates | species | 75854 | click here |
| anas querquedula | Yes | species | eukaryota | vertebrates | species | 75856 | click here |
| anas rubripes | Yes | species | eukaryota | vertebrates | species | 75857 | click here |
| anas sp. | Yes | no rank | eukaryota | vertebrates | species | 42806 | click here |
| anas superciliosa | Yes | species | eukaryota | vertebrates | species | 45632 | click here |
| anas zonorhyncha | Yes | species | eukaryota | vertebrates | species | 75864 | click here |
| anatidae | Yes | | | vertebrates | family | 8830 | click here |
| anhinga | Yes | | | vertebrates | genus | 9212 | click here |
| anodorhynchus leari | Yes | species | eukaryota | vertebrates | species | 178882 | click here |
| anser | Yes | | | vertebrates | genus | 8842 | click here |
| anser albifrons | Yes | species | eukaryota | vertebrates | species | 50365 | click here |
| anser anser | Yes | species | eukaryota | vertebrates | species | 8843 | click here |
| anser anser domesticus | Yes | subspecies | eukaryota | vertebrates | subspecies | 8848 | click here |
| anser canagica | Yes | species | eukaryota | vertebrates | species | 107021 | click here |
| anser cygnoides | Yes | species | eukaryota | vertebrates | species | 8845 | click here |
| anser cygnoides domesticus | Yes | subspecies | eukaryota | vertebrates | subspecies | 381198 | click here |
| anser fabalis | Yes | species | eukaryota | vertebrates | species | 132587 | click here |
| anser indicus | Yes | species | eukaryota | vertebrates | species | 8846 | click here |
| anser sp. | Yes | no rank | eukaryota | vertebrates | species | 8847 | click here |
| anseriformes | Yes | | | vertebrates | order | 8826 | click here |
| anthropoides virgo | Yes | species | eukaryota | vertebrates | species | 9111 | click here |
| anthus rufulus | Yes | species | | | species | 1463608 | click here |
| antigone antigone | Yes | species | | | species | 2717063 | click here |
| antilocapra americana | Yes | species | eukaryota | mammals | species | 9891 | click here |
| antrozous pallidus | Yes | species | eukaryota | mammals | species | 9440 | click here |
| aotus azarai | Yes | species | eukaryota | primates | species | 30591 | click here |
| aotus trivirgatus | Yes | species | eukaryota | primates | species | 9505 | click here |
| apodemus agrarius | Yes | species | eukaryota | rodents | species | 39030 | click here |
| apodemus draco | Yes | species | eukaryota | rodents | species | 129247 | click here |
| apodemus peninsulae | Yes | species | eukaryota | rodents | species | 105297 | click here |
| apodemus sylvaticus | Yes | species | eukaryota | rodents | species | 10129 | click here |
| aquila chrysaetos | Yes | species | eukaryota | vertebrates | species | 8962 | click here |
| ara ararauna | Yes | species | eukaryota | vertebrates | species | 9226 | click here |
| ara macao | Yes | species | eukaryota | vertebrates | species | 176014 | click here |
| arctictis binturong | Yes | species | eukaryota | mammals | species | 94180 | click here |
| arctocephalus gazella | Yes | species | eukaryota | mammals | species | 37190 | click here |
| ardea alba | Yes | species | eukaryota | vertebrates | species | 110620 | click here |
| ardea cinerea | Yes | species | eukaryota | vertebrates | species | 30390 | click here |
| ardeidae | Yes | | | vertebrates | family | 8899 | click here |
| arenaria interpres | Yes | species | eukaryota | vertebrates | species | 54971 | click here |
| artibeus | Yes | | | mammals | genus | 9416 | click here |
| artibeus jamaicensis | Yes | species | eukaryota | mammals | species | 9417 | click here |
| artibeus lituratus | Yes | species | eukaryota | mammals | species | 27634 | click here |
| artibeus phaeotis | Yes | species | eukaryota | mammals | species | 40229 | click here |
| arvicanthis sp. | Yes | no rank | eukaryota | rodents | species | 61158 | click here |
| asio otus | Yes | species | eukaryota | vertebrates | species | 111810 | click here |
| aspidites melanocephalus | Yes | species | eukaryota | vertebrates | species | 51883 | click here |
| athene noctua | Yes | species | eukaryota | vertebrates | species | 126797 | click here |
| aves | Yes | | | vertebrates | class | 8782 | click here |
| aythya americana | Yes | species | eukaryota | vertebrates | species | 30385 | click here |
| aythya ferina | Yes | species | eukaryota | vertebrates | species | 219593 | click here |
| balaena mysticetus | Yes | species | eukaryota | mammals | species | 27602 | click here |
| balaenoptera physalus | Yes | species | eukaryota | mammals | species | 9770 | click here |
| bandicota bengalensis | Yes | species | eukaryota | rodents | species | 69079 | click here |